Overview
The ppm-level and percentage-level (%) CO (Carbon Monoxide) gas analyzers are widely deployed in metallurgical steel production, power plant boiler combustion optimization, coal mine early fire detection, chemical synthesis loops, and industrial safety. Utilizing high-performance NDIR or electrochemical technologies, the ppm-level analyzer specializes in tracking incomplete combustion (air-to-fuel ratio optimization), coal mine gob early heating warning, and workplace safety exposure monitoring. Meanwhile, the percentage-level (%) analyzer focuses on analyzing the energy value of blast furnace gas, coke oven gas, and converter gas, as well as monitoring chemical syngas composition to enhance energy efficiency and safeguard operations.
Principle
Various polyatomic gases (CO, CO2, CH4, etc.) absorb infrared light not the whole band, but only a part of the band, which are called characteristic absorption bands. Different gases have different infrared absorption wavelengths. Infrared photometry analyzer is based on the characteristic of selective absorption of infrared radiation at different wavelengths of certain gases. When infrared light pass through a gas mixture, the measured component of the gas absorbs the infrared radiation energy, according to the Lambert-Beer absorption law, the concentration of a gas can be determined from the change in light intensity.
Application
• Combustion Tuning & Boiler Optimization [ppm Range]
Incomplete Combustion Tracking: High-precision measurement of ppm-level CO in flue gas of industrial boilers and coal-fired power plants to optimize air-to-fuel ratios, reducing fuel waste and minimizing emissions.
Safety Interlocks for Electrostatic Precipitators (ESP): Real-time ppm-level CO monitoring in post-combustion ducts to prevent catastrophic explosions in downstream dust collection systems (ESP) caused by sparks in carbon-rich environments.
• Metallurgical Steelmaking & Fuel Gas Recovery [Percentage % Range]
Steel Gas Valorization: Measuring percentage-level CO in Blast Furnace Gas (BFG), Coke Oven Gas (COG), and Converter Gas (LDG) to calculate calorific heating values for power generation and combustion blending.
Gas Recovery Optimization: Tracking the concentration transition of CO during oxygen converter blowing phases to safely switch between gas venting and gas collection modes.
• Coal Mine & Industrial Safety [ppm to % Range]
Early Fire Warning in Coal Mines: Detecting ppm-level concentrations of CO in mine shafts, ventilation air, and gob areas to identify early-stage coal self-heating and spontaneous combustion.
Workplace Ambient Safety: Continuous safety monitoring in enclosed areas, steel plants, parking structures, and blast furnace platforms to protect workers from toxic CO exposure.
• Chemical Synthesis & Syngas Quality Control [Percentage % Range]
Steam Methane Reforming & Coal Gasification: Analyzing CO percentage in raw syngas used as feedstocks for methanol, oxo-alcohol, and ammonia synthesis.
Catalyst Performance Tracking: Monitoring reactor loop gases to ensure precise stoichiometric reactant ratios, maximizing chemical yields and preventing catalyst degradation.
Measurement components and ranges
• CO: 0 ~ 500ppm up to 100%(Vol)
For detailed introduction, please refer to Infrared photometry analyzer.